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zsolisSep 23, 2025
What does MMC operation failed mean on my SMA Inverter display?
- JJames FrancoSep 23, 2025
If "MMC operation failed" appears on the display, check the card on your PC/laptop. If necessary, use a new MMC/SD card.
What does MMC operation failed mean on my SMA Inverter display?
If "MMC operation failed" appears on the display, check the card on your PC/laptop. If necessary, use a new MMC/SD card.
What to do if QCG does not run once on SMA Sunny Island 5048?
Switch off the Sunny Island 5048 and switch it back on.
Why does the generator or grid not reconnect, although the cutoff limit (for voltage or frequency) is now no longer being breached on my SMA Sunny Island 5048 Inverter?
The Sunny Island connects with a hysteresis, meaning the connection value is slightly below or above the disconnection value. These limiting values are predefined.
What to do if the display of my SMA Sunny Island Inverter is dark?
If the display of your Sunny Island is dark, first check if the DC circuit breaker on the Sunny Island is set to "On." The device might have switched off to protect the batteries from deep discharge. Also, the external battery fuse may have tripped.
Why does my SMA Sunny Island connect to the running generator only for a short time?
Your Sunny Island might connect to the running generator for only a short time if the limits for the maximum permissible AC voltage or the minimum permissible frequency of the generator are too strict. These parameters are located in the menu "233# Generator Control". Adjust the voltage and/or frequency limiting values, while being mindful of the technical data for your generator.
Why is my SMA Sunny Island staying on even though I switched the DC circuit breaker to Off?
Your Sunny Island may still be powered by the AC side. To resolve this, switch off all AC consumers and disconnect them from the Sunny Island.
Why does the Sunny Island SMA not connect to the running generator?
The Sunny Island may fail to connect to the running generator for several reasons. First, check the generator's fuse. Second, verify that the power fed back into the generator during the permissible time hasn't been exceeded, indicated by a "!" display. If exceeded, the generator connection is blocked; acknowledge it by setting the "540.02 GnAck" parameter to Ackn. Third, if the generator control relay (GnReq) is open, ensure the generator is set to autostart via the "234.07 GnStrMod" parameter. Finally, if a GenMan is used, check the return signal, as the generator can only be manually started with GenMan.
What to do if "MMC operation failed" appears on the display of my SMA Sunny Island 5048?
If the message "MMC operation failed" appears on the display, it indicates an issue with an action performed using the SD card. Check the card on your PC/laptop. If necessary, use a new SD card.
What do I do when a battery cell can no longer be used in my SMA Sunny Island 5048 Inverter system?
If a battery cell is unusable, remove it from your battery bank. Then, start the Sunny Island and change the battery voltage in the QCG under "New Battery".
What can I do when the QCG does not run on my SMA Inverter?
If the QCG does not run, switch off the Sunny Island and then restart it.
General| Output Voltage | 230 V |
|---|---|
| Nominal AC Voltage | 230 V |
| AC Frequency | 50 / 60 Hz |
| DC voltage range | 40 - 60 V |
| Battery Voltage | 48 V |
| Efficiency | 95 % (typical) |
| Weight | 40 kg |
| Protection class | IP 21 |
| Maximum AC Output Power | 5000 W |
| Maximum Efficiency | 96 % |
| Dimensions (H x W x D) | 550 x 450 x 230 mm |
| Operating temperature range | -25 °C to +60 °C |
Details the key features and capabilities of the Sunny Island 5048 inverter.
Provides an overview of the device's control elements and connections.
Lists the components included in the product package.
Describes essential grounding procedures for safe installation and operation.
Details the procedures and safety precautions for connecting the DC side.
Explains the AC connection requirements and steps for different configurations.
Details the procedure for starting up and activating the Sunny Island 5048.
Presents the hierarchical structure of the device's menus and submenus.
Explains how to access and use the installer password for system settings.
Details battery temperature monitoring and its impact on operation.
Explains how battery charge and health states are calculated and displayed.
Describes the different charging phases and processes for battery management.
Details the integration and operation of generators with the Sunny Island 5048.
Covers the operation and connection of the Sunny Island 5048 with the public grid.
Classifies errors into levels with corresponding device behaviors and user actions.
Provides solutions for common problems and questions encountered during operation.
